Astronomical ephemeris calculator program. Up to home page, other programs. Get source code and executable program aa 5. AA. ZIP v. 5. 5. This program computes the orbital positions of planetary. It also reduces star catalogue positions given in either the FK4. Img_thumb800.png' alt='Program That Reads Zip Files' title='Program That Reads Zip Files' />FK5 system. Most of the algorithms employed are from The. Astronomical Almanac AA published by the U. Summary of Power Tab Editor. Creates, reads and plays guitar tablature and bass tablature in the. Version 1. 7. 0. 80 Released September 24, 2000. Mike Fahey. Kotaku elder, lover of video games, toys, snacks and other unsavory things. Although you are more likely to encounter a ZIP file than an RAR file in your everyday activities, both are great at compressing files. However, RARs have numerous. File Conversion Example. Perl is exceptionally good at file conversion. Heres an example where each line in the file has 3 fields in this order A 5 digit zip code. S. Government. Printing Office. Source code listings in C language are supplied in the file. The file aaexe. arc contains an IBM PC executable. Reduction of Celestial Coordinates. Astronomical Almanac. DotNetZip is a FAST, FREE class library and toolset for manipulating zip files. Use VB, C or any. NET language to easily create, extract, or update zip files. The reduction to apparent geocentric. Jet Propulsion. Laboratory DE2. The. results agree exactly with the Astronomical Almanac tables from. Almanacs used slightly different reduction. Certain computations, such as the correction for nutation. AA but are referenced there. In. these cases the program performs the full computations that are. Almanac tables see the references at the. Running the Program. Command input to aa. BZxOIReqOw/TJDRQFTjNwI/AAAAAAAABrE/gbIPt3B_srA/s1600/afs+explorer.png' alt='Program That Reads Zip Files' title='Program That Reads Zip Files' />The program requests date, time, and which. Menu item 0 is the Sun, 3 is the. Moon. The other values 1 9 are planets 9. Each prompt indicates. Input can also be redirected to come from an ASCII file. For example. invoking the program by aa lt command. Menu. item 1 causes the program to exit gracefully, closing the output. Entering line 0 for a star catalogue causes a jump back to the. Initialization. The following items will be read in automatically from a disc file. The file contains one ASCII. A sample initialization. Terrestrial longitude of observer, degrees East of Greenwich. Geodetic latitude of observer program calculates astronomical latitudeHeight above sea level, meters. Atmospheric temperature, degrees Centigrade. Atmospheric pressure, millibars. Input time type 1 TDT, 2 UT, 0 TDT set equal to UTValue to use for delta. T, seconds if 0 then the program will compute it. Orbit Computations. Apache-Directory-Studio_8.png' alt='Program That Reads Zip Files' title='Program That Reads Zip Files' />AA56 astronomical ephemeris calculator program. Up to home page, other programs Get source code and executable program aa56. The program is useful for packaging a set of files for distribution for archiving files and for saving disk space by temporarily compressing unused files or. Several methods of calculating the positions of the planets. These range. in accuracy from a built in computation using perturbation formulae. The program uses as a default a set of trigonometric. Earth and planets. These have. been adjusted to match the Jet Propulsion Laboratorys DE4. Long. Ephemeris 1. Earth to 1 for Pluto. The adjustment was carried out on the. B. C. to 3. 00. 0 A. D. for the outer planets. The. adjustment for the inner planets is strictly valid only from 1. B. C. to 3. 00. 0 A. D., but may be used to 3. B. C. with some loss of. See readme. 4. 04 for additional information. The true. accuracy of positions calculated for prehistoric or future dates. The Moons position is calculated by a modified version of the. Chapront Touze and Chapront. This has a precision. DE4. 04 for all dates between. B. C. and 3. 00. 0 A. D. The real position of the Moon in ancient. Moons orbit. In the absence of an interpolated polynomial ephemeris such. DE2. 00, the highest accuracy for current planetary. Astronomical Almanac. If precise. orbital elements are provided for the desired epoch then the. Almanac tabulations. Entering 9. 9 for the planet number generates a prompt for the. ASCII strings specifying. The items in the specification are. First line of entry. Julian dateinclinationlongitude of the ascending nodeargument of the perihelionmean distance semimajor axis in audaily motion Second line of entry. Julian datevisual magnitude B1,0 at 1. AU from earth and sunequatorial semidiameter at 1au, arc secondsname of the object, up to 1. Angles in the above are in degrees except as noted. Several. sample orbits are supplied in the file orbit. If you read. in an orbit named Earth the program will install the Earth. The entry for daily motion is optional. It will be calculated. Almanac values of daily motion recognize the nonzero mass of the. Mean distance, for an elliptical orbit, is the length of the. If the eccentricity is given to. Similarly a hyperbolic. In both these cases. Elliptical cometary orbits are usually catalogued in terms of. Use the formula. mean distance perihelion distance 1 eccentricity. The epoch of the orbital elements refers particularly to the. Published data. for comets often give the time of perihelion passage as a. Ephemeris Time. To. Driver Solution X100 C more. Julian date for your catalogue entry, run. Julian date. This is the correct. Julian Ephemeris Date of the epoch for your catalogue entry. Example Sky Telescope, March 1. Comet Levy. 1. 99. Oct 2. 4. 6. 86. 64 ET. As. you are prompted separately for the year, month, and day, enter. This date and fraction. JED 2. 44. 81. 89. For comparison purposes, note. Ephemeris Time and Other Time Scales. Exercise care about time scales when comparing results against. The orbit program assumes input date is Ephemeris. Time ET or TDT. Topocentric altitude and azimuth are. Universal Time UT. The program converts. TDT or UT. This is done by the entry for input. If you are comparing positions against. TDT. If you are looking up at. UT. Ephemeris transit times can be. TDT UT. The adjustment for delta. T ET. minus UT is accurate for the years 1. Astronomical Almanac is included in. Outside this range of years, approximate formulas. T. These formulas are based on. Stephenson and Houlden, 1. Borkowski, 1. 98. For precise calculations. Almanac. Note the civil time of day is UTC, which is adjusted by. UT. Updated delta. T predictions can be obtained from this network archive. In addition, the IAU has adopted several other definitions of. The. International Earth Rotation Service is in charge of UT. Precise. data on Earth orientation are available at the IERS anonymous ftp. Rise and Set Times. Each calculation of the time of local rising, meridian transit, and. Even so, the calculation has to be. In view of the first order correction the iteration has a. The program reports the transit that is nearest to the input time. Rise and set times ordinarily precede and follow the transit. Check. the date displayed next to the rise, set, or transit time to be sure. For the Sun and Moon, rise and set times are for the. The computed event times include. Age of the Moon, in days from the nearest Quarter, also has a. Quarter is. always correct, however. The estimated time can be made much more. In other words, the rigorous calculation requires. Ocean Tides. The time of high tide is easy to estimate with an accuracy of a few. The tide occurs slightly ahead of the local meridian transit. Moon. The time difference between tide and transit does not. You can calibrate this difference for. Then the tides on. Predicting the height of the tide is much more difficult. The calculations are about as complicated as planetary theory. Stars. Positions and proper motions of the 5. Fifth Fundamental Catalogue FK5. They are. in the file star. For all of these, the programs output of. AA to the precision of. AA tabulation an arc second. The same is true for 1. FK4 positions taken from the SAO catalogue. The program agrees. AA. Spot checks. against Apparent Places of Fundamental Stars confirm the mean. The APFS uses an older nutation. The program incorporates the complete IAU Theory of Nutation. Items for the Messier catalogue, messier. AA or Sky Catalogue 2. To compute a stars apparent position, its motion since the. Star catalogue files have the following data structure. Each. star entry occupies one line of ASCII characters. Numbers can. be in any usual decimal computer format and are separated from. From the beginning of the. Epoch of catalogue coordinates and equinox. Right ascension, hours. Right ascension, minutes. Right ascension, seconds. Declination, degrees. Declination, minutes.